力学与实践 ›› 2020, Vol. 42 ›› Issue (6): 818-824.DOI: 10.6052/1000-0879-20-041

• 身边力学的趣话 • 上一篇    下一篇

北风卷地白草折——漫话湍流边界层中的涡旋结构

杨绍琼, 姜楠1)()   

  1. 天津大学机械工程学院,天津 300354
  • 收稿日期:2020-02-10 修回日期:2020-03-18 出版日期:2020-12-20 发布日期:2020-12-23
  • 通讯作者: 姜楠
  • 作者简介:1)姜楠,教授,从事流体力学实验研究。E-mail: nanj@tju.edu.cn

THE NORTH WIND SCRAPES THE GROUND, THE FLEABANE DESTROYED——TALKING ABOUT TURBULENT BOUNDARY LAYER AND VORTEX STRUCTURES IN IT

YANG Shaoqiong, JIANG Nan1)()   

  1. School of Mechanical Engineering, Tianjin University, Tianjin 300354, China
  • Received:2020-02-10 Revised:2020-03-18 Online:2020-12-20 Published:2020-12-23
  • Contact: JIANG Nan

摘要:

通过欣赏唐朝著名边塞诗人岑参的《白雪歌送武判官归京》和《走马川行奉送出师西征》中描写北风的佳句,从流体力学的角度解释了"北风卷地白草折"的原因,向读者介绍了湍流基础研究的前沿课题——湍流边界层及其复杂的涡旋结构。

关键词: 湍流边界层, 涡旋, 相干结构

Abstract:

Through appreciating of the description of the north wind and the snow in "A Song of White Snow on Secretary Wu's Return to Capital" and "A Song of Running-horse River in Farewell to General Feng of the Western Expedition" by the famous frontier fortress poet, Cen Shen, in Tang Dynasty, the reason why "The north wind scrapes the ground, the fleabane destroyed" is explained from the view of fluid mechanics. The forefront of the fundamental research of the turbulence, and the complex vortex structures in the turbulent boundary layer are introduced in the meantime.

Key words: turbulent boundary layer, vortex, coherent structure

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